New guy from Poland

There can be a number of reasons to rebuild an L24 with 63K original miles.

1. Perhaps the most common one is - - The car sat for the past 20 years and the person that either sold it or the person that bought it - failed to take all necessary steps to properly "awaken the sleeping beauty"... thus they scuffed the piston rings and/or cylinder walls... maybe they had a valve stuck and the piston hit it... maybe it was simply front or rear main seals leaking and it scared them...

2. The new owner is just going though the entire car. So they pull the engine and sent it out to be rebuilt. That way, when they start out on One Lap Of America, they know the engine is at its best.

3. They wanted to keep the original matching number L24 - but they wanted to bring it up to todays standard of performance - so they send it out for an L28 crank, some rework on the head and larger valves. They were going to re-seal {pan, head, front cover, front and rear main seals} the engine anyway.. so while you have the head off for inspection... might as well go ahead with a few mods at that point.

FWIW,

Carl B.